Lens Tests

About these tests

I'm not a lens tester. I don't do systematic or scientific tests
of lenses, and I don't claim that my results contain the full truth about a lens
or indeed anything useful at all. I mostly do these for my own edification,
and to gain a better understanding of lens performance on a given camera system.

Getting repeatable results is quite hard if you don't have your own testing lab.
In real-world tests (i.e. actual photos) it is practically impossible -
changes in light and atmospheric conditions can result in quite different
image quality for the same subject with the same equipment.
Because of this, I prefer not testing lenses in isolation, but comparing
them against each other. That way, I get results that are valid to compare
for a set of lenses at least.